Lenticular sheet, method for manufacturing same, and lenticular display body

Abstract

The present invention provides a lenticular sheet including a transparent resin substrate stretched in at least one direction, an ink receiving layer provided on one surface side of the transparent resin substrate, and a lenticular lens layer provided on the other surface side of the transparent resin substrate, in which the ink receiving layer is formed on the one surface side of the transparent resin substrate by stretching a transparent resin substrate which is not stretched or stretched in a first direction and on which a coating layer is formed by coating one surface side of the substrate with a coating solution for forming an ink receiving layer; a method for manufacturing a lenticular sheet; and a lenticular display body.

What is claimed is: 
     
       1. A lenticular sheet comprising:
 a transparent resin substrate stretched in at least one direction; 
 an ink receiving layer provided on one surface side of the transparent resin substrate; and 
 a lenticular lens layer provided on another surface side of the transparent resin substrate, 
 wherein the ink receiving layer is formed on the one surface side of the transparent resin substrate by stretching the transparent resin substrate which has not been stretched or has been stretched in a first direction and on which a coating layer has been formed by coating one surface side of the substrate with a coating solution for forming an ink receiving layer, and wherein the ink receiving layer contains a cross-linking agent and at least one resin, which is selected from a polyester, an acrylic resin, or a urethane resin and at least a portion of the resin is cross-linked by a cross-linking agent, and the cross-linking agent is at least one cross-linking agent selected from an oxazoline compound, a carbodiimide compound, or an isocyanate compound. 
 
     
     
       2. The lenticular sheet according to  claim 1 , further comprising:
 an interlayer containing a resin between the transparent resin substrate and the lenticular lens layer. 
 
     
     
       3. The lenticular sheet according to  claim 1 ,
 wherein the transparent resin substrate stretched in at least one direction is a biaxially stretched polyethylene terephthalate film, and 
 the ink receiving layer is formed by stretching the polyethylene terephthalate film, on which the coating layer has been formed by coating the substrate with the coating solution for forming an ink receiving layer, and which has been stretched in the first direction, in a second direction orthogonal to the first direction. 
 
     
     
       4. The lenticular sheet according to  claim 1 ,
 wherein the lenticular lens layer has a plurality of lenses disposed at an interval of equal to or less than 257 μm. 
 
     
     
       5. The lenticular sheet according to  claim 1  that has a thickness in a range of from 30 μm to 400 μm. 
     
     
       6. A method for manufacturing a lenticular sheet, the method comprising:
 a laminate forming step of forming a laminate, of a transparent resin substrate and a coating layer, by coating one surface side of the transparent resin substrate, which has not been stretched or has been stretched in a first direction, with a coating solution for forming an ink receiving layer; 
 a laminate stretching step of stretching the laminate such that the ink receiving layer has been provided on the one surface side of the transparent resin substrate, and the transparent resin substrate is stretched in at least one direction; and 
 a lenticular lens layer forming step of forming a lenticular lens layer on a side of the transparent resin substrate, which has been stretched in at least one direction, that is opposite to the side provided with the ink receiving layer, after the laminate stretching step, wherein the ink receiving layer contains a cross-linking agent and at least one resin, which is selected from a polyester, an acrylic resin, or a urethane resin and at least a portion of the resin is cross-linked by a cross-linking agent, and the cross-linking agent is at least one cross-linking agent selected from an oxazoline compound, a carbodiimide compound, or an isocyanate compound. 
 
     
     
       7. The method for manufacturing a lenticular sheet according to  claim 6 , wherein the laminate forming step further comprises coating another surface of the transparent resin substrate with a coating solution for forming an interlayer, and the lenticular lens layer forming step comprises forming the lenticular lens layer on the interlayer formed on a side of the transparent resin substrate. 
     
     
       8. The method for manufacturing a lenticular sheet according to  claim 6 ,
 wherein the transparent resin substrate in the laminate forming step is a uniaxially stretched polyethylene terephthalate film stretched in the first direction, and 
 a stretching direction in the laminate stretching step is a second direction orthogonal to the first direction in the uniaxially stretched polyethylene terephthalate film. 
 
     
     
       9. A lenticular sheet comprising:
 a transparent resin substrate; 
 a first ink receiving layer provided to contact one surface of the transparent resin substrate; 
 a second ink receiving layer provided on a side of the first ink receiving layer that is opposite to the transparent resin substrate side; and 
 a lenticular lens layer provided on another surface side of the transparent resin substrate, 
 wherein an adhesiveness of the first ink receiving layer with respect to the transparent resin substrate is higher than an adhesiveness of the second ink receiving layer with respect to the transparent resin substrate, and 
 an adhesiveness of the second ink receiving layer with respect to ink is higher than an adhesiveness of the first ink receiving layer with respect to ink, and wherein each of the first ink receiving layer and the second ink receiving layer independently contains a cross-linking agent and at least one resin, which is selected from a polyester, an acrylic resin, or a urethane resin and at least a portion of the resin is cross-linked by a cross-linking agent, and the cross-linking agent is at least one cross-linking agent selected from an oxazoline compound, a carbodiimide compound, or an isocyanate compound. 
 
     
     
       10. A lenticular display body comprising:
 the lenticular sheet according to  claim 1 ; and 
 an image layer including two or more kinds of parallax images for display that are arrayed in a direction perpendicular to a longitudinal direction of a lenticular lens of the lenticular lens layer, 
 wherein the image layer is provided on a surface of the ink receiving layer of the lenticular sheet. 
 
     
     
       11. The lenticular display body according to  claim 10 ,
 wherein the image layer includes the two or more kinds of parallax images and a common image formed between adjacent parallax images by a portion common to the adjacent parallax images. 
 
     
     
       12. The lenticular display body according to  claim 10 , further comprising:
 a protective layer protecting the image layer. 
 
     
     
       13. The lenticular display body according to  claim 10 ,
 wherein the two or more kinds of parallax images included in the image layer contain character information to be independently displayed in a plurality of languages, and 
 when the image layer is observed through the lenticular lens layer, the languages in which the character information is displayed are switched with each other according to an observation angle. 
 
     
     
       14. A business card, comprising the lenticular display body according to  claim 13 . 
     
     
       15. The lenticular display body according to  claim 13 ,
 wherein the character information is displayed in three or more languages that are switched with each other according to the observation angle. 
 
     
     
       16. The lenticular display body according to  claim 13 ,
 wherein the image layer includes common items common to at least two languages among the plurality of languages, and 
 when the observation angle is changed, the common items are displayed in the same position between the at least two languages including the common items. 
 
     
     
       17. The lenticular display body according to  claim 13 ,
 wherein the lenticular lens layer and the image layer are provided on both surfaces of the lenticular display body, and 
 on the both surfaces, the languages in which the character information is displayed are switched with each other according to the observation angle. 
 
     
     
       18. The lenticular display body according to  claim 10 ,
 wherein paper is bonded to the surface of the lenticular display body provided with the image layer. 
 
     
     
       19. The lenticular display body according to  claim 17 , wherein:
 the lenticular lens layer and the image layer are provided on both surfaces of the lenticular display body, 
 the image layer on one surface contains character information displayed in first to third languages that are switched with each other according to the observation angle, and 
 the image layer on the other surface contains character information displayed in fourth to sixth languages that are different from the first to third languages respectively and switched with each other according to the observation angle. 
 
     
     
       20. The lenticular sheet according to  claim 2 , wherein a film thickness of the interlayer is in a range of from 0.05 μm to 0.1 μm. 
     
     
       21. The method for manufacturing a lenticular sheet according to  claim 7 , wherein a film thickness of the interlayer is in a range of from 0.05 μm to 0.1 μm.